Hi Bill,
May I ask, what voltage biased you made for each drain if you still remember...
Q1=
Q2=
Q3=
Q4=
Does it oscillate at higher volume? Mine is all biased at 4.5v using 8.98v (7809 regulated power transformer). Or did you do further adjust the TRIMMER 1 for more voltage or lesser. Sorry to ask coz mine even adjusting the T1 never seem to stop that squeal. I can only use the volume up to 1 o'clock more than that it whine
Thanks in advance
Angelo
May I ask, what voltage biased you made for each drain if you still remember...
Q1=
Q2=
Q3=
Q4=
Does it oscillate at higher volume? Mine is all biased at 4.5v using 8.98v (7809 regulated power transformer). Or did you do further adjust the TRIMMER 1 for more voltage or lesser. Sorry to ask coz mine even adjusting the T1 never seem to stop that squeal. I can only use the volume up to 1 o'clock more than that it whine
Thanks in advance
Angelo